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RAJASTHAN PMT Rajasthan - PMT Solved Paper-2000

  • question_answer
    If applied torque on a system is zero, i.e., \[\tau =0\], then for that system:

    A)  \[\omega =0\]                 

    B)         \[\alpha =0\]

    C)  \[J=0\]                

    D)         \[F=0\]

    Correct Answer: B

    Solution :

    \[t=I\,\alpha \]                (where \[\tau =\] torque) \[I=\,\]moment of inertia \[\alpha =\,\]angular acceleration if          \[\tau =0\] \[I\,\,\alpha =\,0\] But       \[I\,\,\ne \,0\] \[\therefore \alpha \,\,=\,0\]


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